Purification and Boon retention

I got a question to purification, if for example I complete a district or die a true death, items are purified.

For example: I had a sword with 3 boons on it. Now after purification it has only 2 out of the 3 boons in the armory? Is this intentional?

Same happened with a couple of gloves I stored during a run. They only got 1 boon on it, but now in the armory they have 0 boons after purification.

Am I missing something? I feel like going crazy